Runner for turbines and fluid-pumps.



PATENTED MAY 21, 1901.

' I N. W. AKIMOFF.

RUNNER FOR TURBINBS AND FLUID PUMPS.

APPLICATION FILED FEB.12, 1907.

. "ram/5p WlTI/ESSES turbines and fluid UNITED STATES ATEN oFFIoa. NICHOLAS W. AKIMOFEIIJI MASSAOIIUSETTSQ RUNNER FOR 'TL JRB INES AND FLUID-PUMPS;

ed certain new and useful Improvements Runners for Turbines and Fluid-Pumps, of

which the following is a specification.

My invention has relation to-runners' for uni ssuch as described and claimed in j t e tters Patent. No.

846,971 granted to me under date of March.

12th, 1907 ;'and in such connection it relates more particularly to theconstruction and arrangement of therunners therefor.

The principal objects'of my invention are first; to form the runners ofsections and to removably connect. the sections with each other; second, to obviate bydividing the run ners into sections the coring, of the\n1old otherwise necessary in the solid casting of the runners; third, to connect the runner sections by-bolt's and to so arrange the same as to not interfere. with-the passage. of the'fluid through therunners.

The nature and scope of my invention will be more fully understood from the following description taken inconnection withthe accon'lpanyingdrawings forming part hereof, in which Figures 1 a d 2 are views, illustrating re spectively, partly in section and partly in elevation a runner having an inlet and outlet formed by two sections, and bolts passing through the vanes of one section for removabl connecting the sections with each other, em odying main features of my invention; and Fig. 3 is a view, illustrating partly in section and partly in elevation, a series of sectional runners and a modified form of connecting the outer and innersectionswith each other,

Referring to the drawings with reference to Figs: 1 and 2 thereof, 8 is a shaft to which by means of a key 9, is rigidly secured the section 24, of a sectional runneNQ, provided with curved vanes or wings 12, for'inedintegral therewith. the vanes or Wings 12, so ports the section 25, which when connected it snugly u on the vanes 12. Thesectioris 24 and 25, w en assembled form a complete runner'lO; The

preferredmeans for removably connecting the sections 24 and 25, with each other, consist of bolts 17, which pass through openings Speeificationot Letters Patent, I

. Application filed February 12, 1907. Serial Illa- 357,045.

The section 24, bymeans of x Q Patented May21, 190"7 18, arrangedin the vanes 12. A-boss 19, formed at eachside of the sections 24 and 25, of the runner 10, permits ofqthe proper en-- gagement of the head 20, and nut 21, of the bolts '17 therewith. Instead of forming the wings or vanes integral with the section 24, the same may be formed integral w-ith'the sec' tion 25. However, byformmg the same integral with one of the sections, the vanes '12, are more readily accessible and may be given the proper curvature, if not'pro 'erly casted and also a smooth surface to 0 er less friction to the passage of fluid through the runner. By dividing the runner 10, into section's, the coring of the mold, as is required,

in the solid-casting of the same, is obviated.

The type of runner, shown in Figs: 1 and 2 is suitable for use in multista e turbo-pumps of special construction. Ass ownin Fig: 3, in such type of pump, thefluid in assing through the runners, 1s confined tinti reach ing the outlet of the pump, notshown. .--The sections 24 and 25 forming the runner may be connected by bolts 17, in the manner shown inEigs: 1 and 2; or all the opter sections 25., whenthe runners are assembled in a turbopump, not shown, may directlyconnected with each other by long bolts 26, as shown in Fig: 3. In this instance the inner sections 24, secured to the shaft 8, are connected with the' outer sections 25, by bolts or dowel pins 28, terminating in the vanes dr wings 12, of the runner 10. In this manner the inner and outer sections 24 and 25, are rigidlyconnected with each other, and canbe readily separated by the removal of the bolts 26 and 28; The in'lets 29 and 30, of this ty e of runner are located at opposite sides oft e same'and are arranged alternately near the shaft 8, and peil ifhery thereof, as shown in Fig: 3.

aving thus described the nature and objects of my invention, what I claim and desire to secure by'Letters Patent is:--

1. of one is provided with vanes formedintegral therewith and both sections-in conjunction with the vanes arranged to form'passages for fluid, -means passing through'said' sections and vanes for connecting the sections with each other without-obstructing the passage of fluid therethroughand means introduced in said outer sectionsiadapted to re-' movably. connect such, sections witheach other. r f

2. Arunner, having a series of runners,

A runner, cfinsisting of sections, whereeach consisting of sections whereof one is provided with vanes'forme'd inte ral therewith the respective'outer sections.

with and having openings, each 0 the outer In testimony whereof; I have hereunto set sections having communicating openings] my signature in the presence of two subscrib ,5 bolts passing throfl h the openings of said witnesses.

outer sections and a a ted to reinovably conv NICHOLAS W. AKIMOFF. nect said sections wit each other, and bolts Witnesses: passing through the outer sections and into p ALBERT S. N. HIoKFoRD, r the openings of the vanes of said mner sec- J. WALTER DOUGLASS.

tions to connect each of said inner sections 10 

